import javax.annotation.Nullable;

public class HierarchicalClassLoaderStructure implements ClassLoaderStructure {
    private final ClassLoaderSpec self;
    private final HierarchicalClassLoaderStructure parent;

    public HierarchicalClassLoaderStructure(ClassLoaderSpec self) {
        this(self, null);
    }

    public HierarchicalClassLoaderStructure(ClassLoaderSpec self, @Nullable HierarchicalClassLoaderStructure parent) {

        // Add the Gradle API filter between the user classloader and the worker infrastructure classloader
        return new HierarchicalClassLoaderStructure(workerExtensionSpec)
                .withChild(gradleApiFilter)
                .withChild(userSpec);
    }

        then:
        1 * classLoaderStructureProvider.getInProcessClassLoaderStructure(_, _) >> { args -> new HierarchicalClassLoaderStructure(new VisitableURLClassLoader.Spec("test", args[0].collect { it.toURI().toURL() })) }

        and:
        requirement.classLoaderStructure.spec.classpath.contains(foo.toURI().toURL())
    }